Răspuns:
Explicație pas cu pas:
6b
|..........................|.........................|
|...........................| 307.................|
2 segmente 2*307
307=2*307-307
7 asemanator ("analog" se zice la mate), dar mai greu
|..........................|..........................|..........................|.
|........................../.......................72..................../
2 segmente 72
un segment, numarul mic 72:2=36
3 segmente, numarul mare =36*3=108
verificare
108-36=72